Jar-closure.



C. C. PARKER.

' JAR CLOSURE. APPLICATION FILED MAY 8, WM.

1,135,713 Patented A r. 13, 1915.

i WE

CHARLES C. PA RKEB, 0F BALTIMORE, MARYLAND.

JAR-CLOSURE.

Specification of Letters Patent.

Application filed May 8, 1914. Serial No. 837,109.

To all whom it may concern:

Be it known that 1, CHARLES C. PARKER, a citizen of the United States of America, and resident of Baltimore, Maryland, have invented certain Improvements in J ar-Closures, ofwhich the following is a specification.

This invention relates to an improved closure for milk jars, formed of pulp board or some analogous substance; and it consists principally, in a hollow diametrically contractible plug or stopper of peculiar construction, adapted to be forced into the throat of the jar, provided with a cap which rests upon and extends over the exterior lip of the jar, as will hereinafter fully appear.

In the further description of the said invention which follows, reference is made to the accompanying drawing forming a part hereof, and in which:

Figure 1 is a vertical central section of the upper portion of a ar to which is applied the improved closure, and Fig. 2 a top view of the same. Fig. 3 is an underside view of Fig. 2, and Fig. 4 an enlarged sectional view of a part of Fig. 1.

Referring now to the the drawing, 1 represents the head of the jar, and 2 an annular projection within the throat 3 of the same.

The closure consists of an inverted cupshaped plug, the skirt a of which is pro vided with an upwardly and outwardly extending flange 7), whereby a contractible edge is produced adapted to fit closely against the under surface of the throat of the jar, combined with a cap 0 which covers the exterior lip d of the jar. These parts are secured together preferably by means of a staple e as shown in the drawing.

To fullyumderstand the advantageof a cup-shaped plug provided with an upturned flange as described, over a flat disk as a device to close the mouth or throat 3 of a jar and produce a practically liquid tight joint, it must be borne in mind that a flat disk of pulp board or some similar material, has only slight diametric compressibility, and is therefore unfitted for use should the disk be applied to a jar having a throat of less than the standard size.

In a cup-shaped plug its skirt a has a certain diametric compressibility independently of the crown f from which it depends, and when its edge is provided with the upturned flange 7) which is susceptible to dia-- metric contraction independently of the skirt, the compressibility of the plug is Patented Apr. 13, 1915.

much increased, and to such an extent that;

it is adapted as a closure for jars the throats of which difler considerably in size, and a close or liquid-tight joint produced.

While a stopper constructed as described is well adapted for the purpose in view, it

is desirable to stiffen thecap, and the skirt of the cup-shaped plug, so that the contraction of the device in its application to jars, will be confined as much as possible to the upturned flange, in order that in the removal of the closure from a jar, the cap portion of the closure will not be rendered inapplicable for reattachment to the jar should such be required, I therefore apply to the outer surface of the cup-shaped plug, a flanged reinforce 5 of the edge of the flange g of which extends to near the junction of the upturned flange I), with the skirt a of the stopper. lVith the aid of this addition to the plug, the bending of the flange of the skirt takes place mainlyat the edge of the reinforce, and the closure can be removed from the jar without distortion of its cap element.

To effect the detachment of the closure from the jar, without distorting or break-' ing the cap element thereof, I provide the cap with a. tongue 7 which is raised slightly as shown in Fig. 1 to admit of the insertion of the thumb nail underneath it. The space it produced in cutting the tongue is closed in the paraffining of the closure.

It will be understood that milk jars are usually filled to the shoulder 2, and when a flat disk is employed as a closure and laid upon the said shoulder, there is no provision for the expansion of the milk should its temperature be increased, and in consequence the disk is raised from its seat and the jar thereby unsealed.

With my invention as described, the unsealing of the jar due to the cause above stated cannot take place, as the inverted cupshaped construction -of the closure provides ample space for any increase in bulk of the liquid contents of the jar.

I claim as my invention 1. A jar closure comprising an inverted cup -shaped plug or stopper having the skirt thereof provided with an outwardly and upwardly extending flange, adapted for insertion in the throat of the jar, combined with a cap adapted to cover the,exterior lip of the jar, and a flanged reinforce which is secured between the crown and the cap, with its flange in contact with the exterior surface of the sln'rt of the stopper.

2. A jar closure comprising an inverted cup shaped plug or stopper having the skirt thereof provided with an outwardly and upwardly extending flange adapted for insertion in the throat of the jar, combined with a cap adapted to cover the exterior lip of the jar, and a flanged reinforce which is secured between the crown of the stopper and the cap with its flange terminating between thesaid upward flange of the stopper and its skirt. A

3. A ar closure which consists of in-' verted cup-shaped plug or stopper having the skirt thereof provided with an outwardly and upwardly extending continuous or unbroken flange which produces a contractible circular edge adapted to come in contact with the inner surface of the throat of a jar, combined with a cap adaptof the stopper 2 ed to cover the exterior lip of the jar, and to which the stopper is secured, a reinforce interposed between the cap and the plug, and a tongue formed in the cap, through the same down to the surface of the reinforce beneath. v

4. A jar closure which consists of an inverted cup-shaped plug or stopper-having the skirt thereof provided with an outwardly and upwardly extending continuous or unbroken ange which produces a contractible circular edge adapted to come in contact withthe inner surface of the throat of a jar, combined with a cap adapted to cover the exterior lip of thejar, and to which the stopper is secured, an imperforate reinforce interposed between the cap and the plug, and a tongue formed in the cap, by-cutting through the same down to the surface of the reinforce. 4

. CHARLES C. PARKER. Witnesses: 1

-' WM. T. Howmm,

JULIA B.; RoBmsoN.

by cutting 

